The Thule Aion 28L backpack expands to 32L, increasing packable space by 15%. It features a back panel that fully unzips like a suitcase for easy packing and a stowable divider with TPU lining to separate and protect gear. It includes dedicated compartments for electronics and a water bottle pocket. Compatible with the Thule Aion Sling, which attaches as a hip belt for extra weight support and quick access.